Adaptive Actuation Region for Vehicle Collision Avoidance
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Solution Overview
Problem
In vehicles turning on curved roads, existing collision avoidance systems are prone to unnecessary actuation or delayed actuation due to reduced actuation regions, which can lead to ineffective collision prevention.
Innovation Solution
A driving assistance device that adjusts the actuation region by changing the lateral positions of boundary lines closer to the vehicle in the out-of-path direction while maintaining them unchanged in the traveling direction, thereby reducing unnecessary actuations and ensuring timely assistance for potential collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the actuation region is reduced to prevent unnecessary actuation of the safety device, then false alarms are reduced, but the safety device becomes harder to actuate for targets inside the turning direction and actuation delay occurs
Solution Approach 1:
The actuation region is segmented into two distinct zones: a first actuation region in the out-of-path direction with a reduced first actuation distance, and a second actuation region in the traveling direction with a larger second actuation distance. This segmentation allows different safety thresholds for different spatial directions, preventing false alarms from lateral targets while maintaining high sensitivity for forward targets.
Solution Approach 2:
Different actuation distances are applied to different directional zones. The system applies a shorter actuation distance (first actuation distance) specifically to the out-of-path direction where false alarms occur, while maintaining a longer actuation distance (second actuation distance) in the traveling direction where collision risk is highest. This local differentiation optimizes both false alarm reduction and collision detection reliability.
2Object-generated harmful factors
If the actuation region is reduced to avoid unnecessary safety device actuation on lateral targets, then system false positives decrease, but collision avoidance response time is delayed for forward targets
Solution Approach 1:
The detection space is segmented into angular zones with different actuation thresholds. Targets in the out-of-path direction (lateral zones) trigger actuation at a first actuation distance, while targets in the traveling direction (forward zones) trigger actuation at a second actuation distance that is longer than the first. This temporal-spatial segmentation ensures timely response for critical forward threats while filtering lateral false alarms.
Solution Approach 2:
The actuation distance parameter is changed based on the angular position of the detected target. When a target is detected in the out-of-path direction, the system uses a first actuation distance parameter; when a target is detected in the traveling direction, the system uses a second actuation distance parameter that is larger. This parameter adaptation resolves the conflict between false alarm reduction and response time.
Data Source
AI summary
A driving assistance device sets, in front of an own vehicle, an actuation region that is a region sandwiched by boundary lines, positioned at left and right, respectively. In a case where a target existing around the own vehicle has entered the actuation region, the device performs driving assistance for avoiding collision with the target or mitigating collision damage. The device, when setting the actuation region, in a case where the own vehicle is in a turning state, changes a lateral position of a boundary line in an outside in a turning direction of the own vehicle, of the left and right boundary lines of the actuation region, to a position closer to the own vehicle according to turning information. For a boundary line in an inside in a turning direction of the own vehicle, the device does not change a lateral position according to the turning information.